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Custom Sportswear Manufacturer Case Study: How MontForge Built a €120M Activewear Brand

Introduction: From Startup Vision to Global Success | How do you turn a sportswear idea into a globally recognized brand? This case study shows how MontForge, a leading custom sportswear manufacturer, helped Montirex grow from a startup into a $120M+ activewear brand, now sold through top global retailers. If you're looking for a private label activewear manufacturer or a reliable sportswear OEM partner, this is exactly the kind of result you should expect.

A Case Study by MontForge (formerly AIKA)

"The Struggle" - The Challenge of Launching a Sportswear Brand

In 2019, Montirex (formerly Montaga) entered the competitive UK streetwear market with strong ambition—but faced critical challenges:

When Thomas first took over this project in 2019, it was called "MONTAGA."

❌1. Outdated Printing Technology
Traditional screen printing:
Heavy and uncomfortable
Limited color vibrancy
Not suitable for performance sportswear

❌ 2. Poor Fit & Lack of Performance Design
Existing garment patterns:
Didn’t follow ergonomic movement
Restricted athletic performance
Reduced customer satisfaction

❌ 3. Unstable Supply Chain
As a startup, they needed:
Low MOQ flexibility
Fast sampling turnaround
Reliable bulk production

👉 The gap between design vision and real production became the biggest obstacle.

We Needed to Change.

2019, The early days of "MONTAGA".

"The Turning Point" - Full-Service Custom Sportswear Manufacturing

Thomas's decision: Face-to-face, redefining standards

MontForge (formerly AIKA) provided a complete end-to-end sportswear manufacturing solution, combining innovation, design, and scalable production.
Traditional Screen Printing
Glowing Heat Transfer
A bold attempt in craftsmanship
Standard Version
Reshaping the Sports Silhouette
A profound understanding of sportswear patterns

1. Reflective Heat Transfer Technology (Performance + Visibility)

We replaced traditional printing with reflective heat transfer technology, delivering:

Lightweight and breathable finish
High-visibility reflective effect for night safety
Long-lasting durability without cracking

👉 Ideal for running wear, streetwear, and performance apparel

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2. Ergonomic Sportswear Pattern Development

Our expert team redesigned all garments using:
Motion-based pattern engineering
Athlete-centered ergonomic design
Rapid sampling (first sample in 3 days)
Results:
Slim fit + full flexibility
Enhanced comfort and performance
Premium wearing experience

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3. Stable Supply Chain & Quality Control System

We implemented a high-standard manufacturing system:

Multi-stage quality inspection
Production aligned with international retail standards
Vertically integrated supply chain


👉 Result: 5+ years of zero delivery disruption

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Pattern Reshaping

On-site pattern adjustments established a slim-fit athletic cut.

Technological Innovation

Introducing reflective technology, addressing a key pain point in British street culture.

Deep Trust

From this day forward, we are no longer a contract manufacturer, but a technology partner.

"The Result" - From Startup to €120M+ Sportswear Brand

Montirex

With MontForge as their sportswear manufacturing partner, Montirex achieved:
Joining JD Sports and Footasylum

Annual Sales Growth from €100 to €120 million+

Joined JD Sports in 2023
Became one of the fastest-growing activewear brands in the UK
Recognized in UK streetwear market

5-Year Strategic Partnership with Zero Supply Disruptions

Joined Footasylum in 2020
Sold through international retail channels
Built a loyal customer base

“Montirex’s success proves one thing: when exceptional manufacturing meets the right brand, it can create market miracles. Today, AIKA (now MontForge) has successfully helped numerous brands gain access to top retailers.”

"The Evolution" - Montforge Makes Its Debut

In order to successfully
replicate, we evolved

Montirex's story is not only a victory for its clients, but also a core belief we want to convey: manufacturing is the engine of brand growth. To standardize this "incubation capability," we upgraded AIKA to MontForge. We are committed to providing global brands with integrated solutions based on "innovation + functionality + quality."

Why Choose MontForge as Your Custom Sportswear Manufacturer?

Whether you're launching a new brand or scaling an existing one, MontForge offers:

✔ Full Private Label Solutions

From design to production to delivery

✔ Fast Sampling (3–7 Days)

Reduce time-to-market significantly

✔ Flexible MOQ

Perfect for startups and scaling brands

✔ Advanced Fabric & Technology

Including:
Reflective materials
Moisture-wicking fabrics
Sustainable textiles

✔ Global Shipping & Reliable Delivery

Trusted by brands selling worldwide

Who Is This For?

We work with:

Startup activewear brands


Streetwear & athleisure brands


Fitness and gym apparel brands


E-commerce (Shopify / Amazon) sellers


Established brands scaling production


Innovation

Proactive research and development of cutting-edge fabrics

Function

Development of ergonomic sports patterns

Quality

The factory standards here are JD Sports' warehousing standards.

"Start Your Custom Sportswear Project Today"

Your brand could be the next success story.👉 Get a Free Quote (Within 48 Hours)

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Frequently Asked Questions


  • Can I order samples before placing a bulk or wholesale order?

    MontForge encourages clients to order samples before committing to wholesale apparel orders. This process ensures that the final product meets your specifications and quality expectations. The sample process is structured as follows:

    1. 1.Sample Request: Clients provide technical specifications, fabrics, sizes, and branding requirements. MontForge can also provide professional advice on fabric selection and design adjustments to optimize fit and durability.

    2. 2.Sample Production: Our team produces one or more units according to client requirements, applying the same quality standards and craftsmanship as in bulk production.

    3. 3.Testing and Review: Clients can review the sample for fit, comfort, color accuracy, and overall appearance. If desired, minor modifications can be requested to improve garment quality.

    4. 4.Approval for Bulk Orders: Once the sample is approved, MontForge uses it as a reference for full-scale production. Patterns, size grading, and fabric details are retained to ensure consistency across the entire order.

    5. 5.Cost & Lead Time: Sample costs are charged separately and are often credited against bulk orders. Lead times are shorter than full production but follow the same rigorous quality control protocols.

    By offering pre-production samples, MontForge reduces the risk of errors in bulk orders, ensures compliance with client expectations, and fosters trust with international B2B clients.


    Relevant Keywords: apparel sample order, OEM activewear sample, pre-production testing

    Mar 26,2026
  • What types of fabrics do you use for activewear?

    MontForge selects fabrics for durability, comfort, and performance in activewear. The selection process includes:

    1. 1.Polyester & Nylon Blends:

      • Lightweight, durable, moisture-wicking, and ideal for running, fitness, and outdoor activities.

    2. 2.Spandex & Elastane:

      • Provides stretch and recovery for leggings, sports bras, and performance wear.

      • Ensures flexibility and comfort during high-intensity activities.

    3. 3.Breathable & Moisture-Wicking Fabrics:

      • Keeps wearers dry and comfortable by moving sweat away from the skin.

      • Improves user experience during workouts, yoga, or casual activewear use.

    4. 4.Sustainable & OEKO-TEX Certified Materials:

      • Ensures fabric safety and compliance with international standards.

      • Supports environmentally responsible apparel production.

    5. 5.Customization Options:

      • Clients can select fabric weight, texture, color, and performance properties according to brand needs.

      • MontForge provides advice for UV protection, lightweight performance, and durability.

    6. 6.Quality Assurance:

      • Fabrics undergo rigorous testing for colorfastness, pilling, shrinkage, and abrasion resistance.

      • Ensures consistency across production batches for OEM and private label orders.

    Through careful fabric selection and performance testing, MontForge ensures that activewear garments meet international B2B standards, providing comfort, durability, and style for end consumers.


    Relevant Keywords: activewear fabrics, performance textiles, moisture-wicking sportswear, OEM clothing materials

    Feb 5,2026
  • What is the duration (lead time) for receiving my wholesale apparel order?

    Lead time for wholesale apparel orders with MontForge varies based on several factors:

    1. 1.Order Quantity: Small-batch or sample orders typically take 2–4 weeks. Medium and large orders may require 6–10 weeks.

    2. 2.Fabric & Material Availability: If materials are in stock, production begins immediately. Custom fabrics or imported materials may add extra time.

    3. 3.Design Complexity: Orders with advanced customization, embroidery, printing, or multi-layer garments may require additional production time.

    4. 4.Quality Control: Multi-stage inspections are applied throughout production, including in-line QC and pre-shipment checks, which add a few days but ensure defect-free delivery.

    5. 5.Shipping & Logistics: Lead time also includes shipping, which can vary depending on destination and chosen logistics method (sea, air, or express).

    6. 6.Rush Orders: Expedited production is available for urgent orders with adjusted scheduling and additional costs, ensuring critical deadlines are met without compromising quality.

    MontForge ensures transparent communication throughout the production process, providing clients with milestone updates and estimated completion dates. This structured approach allows buyers to plan inventory, marketing, and distribution efficiently.


    Relevant Keywords: wholesale apparel lead time, OEM sportswear production, B2B order schedule

    Feb 5,2026
  • What makes MontForge different from other manufacturers?

    MontForge distinguishes itself from other manufacturers in the apparel industry through multiple advantages:

    1. 1.Flexible MOQ:

      • Supports small-batch testing, medium-scale orders, and large-volume production, enabling brands of all sizes to work with us.

    2. 2.OEM & ODM Expertise:

      • Provides design, pattern-making, fabric recommendation, and private label services.

      • Ensures that both standard and custom products meet client specifications.

    3. 3.Quality Assurance:

      • Multi-stage QC ensures consistent product quality, from raw material inspection to pre-shipment review.

      • Certified to ISO, BSCI, and OEKO-TEX standards for international compliance.

    4. 4.Global B2B Experience:

      • Experienced in US, EU, and other regulated markets, familiar with labeling, packaging, and compliance standards.

      • Helps clients navigate international logistics and distribution.

    5. 5.Customer-Centric Approach:

      • Offers clear communication, professional consultation, and production updates throughout the order lifecycle.

      • Provides solutions for rush orders, partial shipments, and long-term partnerships.

    6. 6.Innovation & Design Support:

      • Supports fabric innovation, sustainable sourcing, performance wear, and activewear trends to keep clients competitive in the market.

    MontForge’s combination of flexibility, expertise, and high-quality standards allows clients to reduce risks, optimize production, and maintain strong brand reputation internationally.


    Relevant Keywords: OEM activewear manufacturer, B2B sportswear supplier, private label clothing

    Feb 5,2026
  • Do you support private labeling for activewear?

    MontForge offers comprehensive private label services to help brands create unique, market-ready apparel. The process includes:

    1. 1.Design Customization:

      • Clients provide logos, color palettes, and branding guidelines.

      • MontForge assists in adapting designs for optimal placement and visual impact on garments.

    2. 2.Fabric & Material Selection:

      • Private label garments can use MontForge’s high-performance fabrics or client-provided materials.

      • Recommendations are provided for comfort, durability, and compliance with international standards.

    3. 3.Labeling & Packaging:

      • Includes woven labels, hangtags, polybags, and retail-ready packaging.

      • Custom packaging supports brand recognition and premium unboxing experiences.

    4. 4.Quality Assurance:

      • Multi-stage QC ensures that private label products meet brand standards, including logo accuracy, color matching, and stitch quality.

    5. 5.Production Flexibility:

      • Supports small-batch testing, seasonal collections, and large-volume orders.

      • Patterns and tech packs are retained for repeat orders, ensuring consistency.

    6. 6.Regulatory Compliance:

      • Garments and labels meet US, EU, and other market requirements.

      • Supports client entry into regulated markets with confidence.

    MontForge’s private label service allows B2B clients to launch custom-branded activewear efficiently, maintain high quality, and scale production globally.


    Relevant Keywords: private label activewear, OEM branding, custom sportswear

    Feb 5,2026

Learn how to build a successful sportswear brand.

Whether you are a disruptive startup or an established enterprise, MontForge is your ideal custom sportswear manufacturer and outdoor apparel supplier. Let’s turn your vision into a market-leading reality.

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